Those who gain a deeper inside into the subject of visual sketch notes, cannot avoid using the black fineliners in graded line width. Only in this way you can reach a perfect interaction of line width for outlines, shadings and markings. To highlight our work with different colours, we have decided to use a permanent ink which a traditional German manufacturer produces exclusively for us.

The set includes 4 SketchOne - each one in 0.1 mm, 0.3 mm, 0.5 mm and 0.7 mm

Perfect

At the beginning, I was skeptical about these pens. I bought them on the advice of a colleague.
I have to say they are perfect. They do enable to have a varied practice of sketchnoting when only in black and white. Furthermore, they can be coloured on, the ink is permanent (if I'm note mistaken)